text: // Copyright 2016 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef CHROME_BROWSER_UI_WEBUI_WELCOME_WELCOME_HANDLER_H_
  #define CHROME_BROWSER_UI_WEBUI_WELCOME_WELCOME_HANDLER_H_
  
  #include "base/macros.h"
  #include "chrome/browser/ui/webui/signin/login_ui_service.h"
  #include "content/public/browser/web_ui_message_handler.h"
  
  class Browser;
  class Profile;
  class GURL;
  
  // Handles actions on Welcome page.
  class WelcomeHandler : public content::WebUIMessageHandler {
   public:
    explicit WelcomeHandler(content::WebUI* web_ui);
  
    WelcomeHandler(const WelcomeHandler&) = delete;
    WelcomeHandler& operator=(const WelcomeHandler&) = delete;
  
    ~WelcomeHandler() override;
  
    // content::WebUIMessageHandler:
    void RegisterMessages() override;
  
   private:
    enum WelcomeResult {
      // User navigated away from page.
      DEFAULT = 0,
      // User clicked the "Get Started" button.
      DECLINED_SIGN_IN = 1,
      // DEPRECATED: User completed sign-in flow.
      // SIGNED_IN = 2,
      // DEPRECATED: User attempted sign-in flow, then navigated away.
      // ATTEMPTED = 3,
      // DEPRECATED: User attempted sign-in flow, then clicked "No Thanks."
      // ATTEMPTED_DECLINED = 4,
      // User started the sign-in flow.
      STARTED_SIGN_IN = 5,
      // New results must be added before this line, and should correspond to
      // values in tools/metrics/histograms/enums.xml.
      WELCOME_RESULT_MAX
    };
  
    void HandleActivateSignIn(const base::ListValue* args);
    void HandleUserDecline(const base::ListValue* args);
    void GoToNewTabPage();
    void GoToURL(GURL url);
    bool isValidRedirectUrl();
  
    Browser* GetBrowser();
  
    Profile* profile_;
    WelcomeResult result_;
  
    // Indicates whether this WelcomeHandler instance is spawned due to users
    // being redirected back to welcome page as part of the onboarding flow.
    bool is_redirected_welcome_impression_;
  };
  
  #endif  // CHROME_BROWSER_UI_WEBUI_WELCOME_WELCOME_HANDLER_H_
  